From: Marcel Hilzinger <marcel@hilzinger.hu>
To: BlueZ development <bluez-devel@lists.sourceforge.net>
Date: Fri, 10 Nov 2006 11:06:38 +0100
References: <200611091102.54282.marcel@hilzinger.hu>
	<200611100901.16410.mhilzinger@linuxnewmedia.de>
	<7A6DA545D7FDCC4B93DB651FDBC1EDDE4E6EA3@eumonex01.palmsource.com>
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Message-Id: <200611101106.38881.marcel@hilzinger.hu>
Subject: Re: [Bluez-devel] RE :  Quality of a2dp sound
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Am Freitag, 10. November 2006 09:41 schrieb Frederic Dalleau:
> Hi,
>
> > a2dpd produces some noise in the background. If there is silence, you c=
an
> > hear it. With a2play there is no noise. I will checkout cvs again and
> > have a look.
>
> I believe this comes from a difference in the sbc encoder (floating vs
> fixed). If you have the latest patch, I would first suggest you increase
> sbcbitpool=3D64 in .a2dprc. If it doesn't work, then the dirty way is to =
swap
> all files from sbc/lib with the corresponding in btsco/sbc and then rebui=
ld
> sbc library and reinstall of course.
I forgot to mention that I use xmms and amarok for the tests.

Important: the noise seems to depend on the soundfile. With some files (mos=
tly =

crappy MP3) the noise difference between bluetooth and conventional wireles=
s =

is quite big. With other files (flac and high quality OGG), there is almost =

no noise difference.

Maybe that's all irrelevant, but theese are my observations.

-- =

=DCdv=F6zlettel -- Mit freundlichen Gr=FCssen,
Marcel Hilzinger

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